Checked out Yama sushi for happy hour last week. I must say I was pretty impressed with their California roll. It was packed with crab salad and it was rolled very nicely. However, my favorite thing here was their gyoza. Normally I don't expect very quality gyoza from sushi places since that is not something they are supposed to specialize in but this gyoza was amazing! They have pretty good prices for happy hour. The only think that I would recommend staying away from is the appetizer which I believe is called tokoyaki. This was one of the weirdest things I've tried. I'm sure some people like it but I thought the texture was just super off putting. Nonetheless, this place has a great location right in central Phoenix and they have an outdoor patio. Great spot for happy hour